Besides a stove top percolator, there is another way to make coffee which requires far less cleanup and works quite well for my wife - who is the coffee drinker in our rig. bonavita is the brand name - check it out. LED lamps, avoiding use of any appliances like coffee makers will really extend your battery life while wild camped. Fans will draw down the battery if used for long periods though they are generally quite efficient. Open the windows, door and roof vents for cross ventilation. Carrying a supply of water to pour into the toilet for flushing will save you from using the pump too.

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“Freethinkers are those who are willing to use their minds without prejudice and without fearing to understand things that clash with their own customs, privileges, or beliefs. This state of mind is not common, but it is essential for right thinking...”
― Leo Tolstoy

Along with this table if you have a dedicated voltmeter installed you will always know the state of charge of your batteries by taking a quick look at the voltmeter. You can order a RioRand digital voltmeter from Amazon for only $7.56.